Hi, I just tested my mail server for security. I got only this warning saying: Reverse DNS does not match SMTP Banner.
what does this mean? I have my own server and notice my host name I use my domain name but at the end before the .com I see my ISP'S name.
For example instead of having a hostname like domain.com.
I have something like this: domain.ISP.com
How do I change this? I manually deleted the .ISP part but still my ISP name automatically gets attached.
Also is there any good tutorial on teaching how to setup postfix with mysql?